For thin gauge steel, such as automotive panels or sheet metal, the cleaning action of AC can prevent porosity and ensure a smooth, shiny weld. Choosing the right current for TIG welding steel is fundamental to achieving clean, strong, and aesthetically pleasing welds.
Achieving a Superior Steel Root Pass with DC Negative Current
Setting the balance toward cleaning maximizes the scrubbing action, which is useful for dirty or oxidized steel. When AC Cleaning Action is Beneficial Removing light rust or mill scale from older steel stock.
Welding reactive alloys that may form an oxide layer. Conversely, AC alternates direction thousands of times per second, creating a cleaning action that removes surface contaminants but offers less concentrated heat.
Achieving a Superior Steel Root Pass with DC Negative Current
Ideal for building up layers or welding in tight spaces. Best Practices and Final Recommendations.
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